Hello,
I got this error:
Error: Cannot use `+.gg()` with a single argument. Did you
accidentally put + on a new line?
After running this:
data(murders)
library(ggplot2)
library(dplyr)
library(ggplot2)
ggplot(data=murders)
#define the slope of the line
r<-murders %>% summarize(rate=sum(total)/sum(population)*10^6)
%>%.$rate
#mamke the plot
murders %>% ggplot(aes(population/10^6,total,label=abb))+
+geom_abline(intercept = log10(r),lty=2,color="darkgrey")+
+geom_point(aes(col=region), size=3)+
+geom_text_repel()+
+scale_x_log10()+
+scale_y_log10()+
+xlab("Populations in millions (log scale)")+
+ylab("Total number of murders (log scale)")+
+ggtitle("US Gun Murders in US 2010")+
+scale_color_discrete(name="Region")+
+theme_economist()
Is this an issue with my dplyr? Or how I can fix this code in order to work?
Thanks
Ana
Richard M. Heiberger
2020-May-08 03:27 UTC
[R] Error: Cannot use `+.gg()` with a single argument.
It is just like the message suggested. You have a + at the end of each line and the beginning of the next. The one at the end is required. The ones at the beginning are causing the error message. Please put spaces around your assignment arrows. Difficult to read: r<-murders Easy to read: r <- murders On Thu, May 7, 2020 at 10:46 PM Ana Marija <sokovic.anamarija at gmail.com> wrote:> Hello, > > I got this error: > Error: Cannot use `+.gg()` with a single argument. Did you > accidentally put + on a new line? > > After running this: > data(murders) > library(ggplot2) > library(dplyr) > library(ggplot2) > ggplot(data=murders) > > #define the slope of the line > r<-murders %>% summarize(rate=sum(total)/sum(population)*10^6) %>%.$rate > #mamke the plot > murders %>% ggplot(aes(population/10^6,total,label=abb))+ > +geom_abline(intercept = log10(r),lty=2,color="darkgrey")+ > +geom_point(aes(col=region), size=3)+ > +geom_text_repel()+ > +scale_x_log10()+ > +scale_y_log10()+ > +xlab("Populations in millions (log scale)")+ > +ylab("Total number of murders (log scale)")+ > +ggtitle("US Gun Murders in US 2010")+ > +scale_color_discrete(name="Region")+ > +theme_economist() > > Is this an issue with my dplyr? Or how I can fix this code in order to > work? > > Thanks > Ana > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]]
Hello, Richard's answer solves the problem, I'm writing about details in the OP's post. Ana, your code example is missing some library() calls: library(ggplot2) library(ggrepel) library(ggthemes) library(dplyr) # and where to find the data set data(murders, package = "dslabs") As for the dplyr pipe, you end it with .$rate to pull only that column's value, the following avoids that construct and is, I believe, more idiomatic: #define the slope of the line r <- murders %>% summarize(rate = sum(total)/sum(population)*10^6) %>% pull(rate) Hope this helps, Rui Barradas ?s 04:27 de 08/05/20, Richard M. Heiberger escreveu:> It is just like the message suggested. You have a + at the end of each line > and > the beginning of the next. The one at the end is required. The ones at > the beginning are > causing the error message. > > Please put spaces around your assignment arrows. > Difficult to read: r<-murders > Easy to read: r <- murders > > On Thu, May 7, 2020 at 10:46 PM Ana Marija <sokovic.anamarija at gmail.com> > wrote: > >> Hello, >> >> I got this error: >> Error: Cannot use `+.gg()` with a single argument. Did you >> accidentally put + on a new line? >> >> After running this: >> data(murders) >> library(ggplot2) >> library(dplyr) >> library(ggplot2) >> ggplot(data=murders) >> >> #define the slope of the line >> r<-murders %>% summarize(rate=sum(total)/sum(population)*10^6) %>%.$rate >> #mamke the plot >> murders %>% ggplot(aes(population/10^6,total,label=abb))+ >> +geom_abline(intercept = log10(r),lty=2,color="darkgrey")+ >> +geom_point(aes(col=region), size=3)+ >> +geom_text_repel()+ >> +scale_x_log10()+ >> +scale_y_log10()+ >> +xlab("Populations in millions (log scale)")+ >> +ylab("Total number of murders (log scale)")+ >> +ggtitle("US Gun Murders in US 2010")+ >> +scale_color_discrete(name="Region")+ >> +theme_economist() >> >> Is this an issue with my dplyr? Or how I can fix this code in order to >> work? >> >> Thanks >> Ana >> >> ______________________________________________ >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >> > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >